<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Title</title>
    <script src="../vueJS/VUE.js"></script>
</head>

<body>
    <div id="root">
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sortType=2">年龄升序</button>
        <button @click="sortType=1">年龄降序</button>
        <button @click="sortType=0">原顺序</button>
        <ul>
            <li v-for='p in filPersons' :key="p.id">{{p.name}}-{{p.age}}</li>
        </ul>
    </div> 
    <script type="text/javascript">
    new Vue({
        el:'#root',
        data:{
            persons:[
                {id:'001',name:'马冬梅',age:18,sex:'女'},
                {id:'002',name:'周冬雨',age:20,sex:'女'},
                {id:'003',name:'周杰伦',age:19,sex:'男'},
                {id:'004',name:'温兆伦',age:21,sex:'男'}
            ],
            keyWord:'',
            sortType:0//存储排序顺序，0原顺序，1降序，2升序
        },
        computed:{//排序就是对筛选完的fP进行sort
            filPersons(){
                const arr = this.persons.filter((p)=>{//过滤器过滤出一个数组，返回就行
                    return p.name.indexOf(this.keyWord)!==-1
                })
                if(this.sortType){
                    arr.sort((a,b)=>{
                        return this.sortType===1? b.age-a.age : a.age-b.age
                    })
                    
                }
                return arr
                
            }
        }
    })
    </script>
</body>
</html>